Honestly, once they get the EV platforms tested, it's just a matter of attaching a body to the "skateboard" and then selling it. EV bypasses all CAFE constraints and there's virtually no powertrain testing required after the initial skateboard (battery/motor/generators). Limited durability testing is a huge coat savings to any company.
Personally, I prefer a internal combustion engine, rear wheel drive. As long as it's powered properly, a turbo 4cyl is great. (although I'd much rather have a 500hp V8)